Merge pull request #563 from hairyhenderson/update-contributing

Updating CONTRIBUTING.md

Author: hairyhenderson

CONTRIBUTING.md

@@ -15,6 +15,8 @@ For PRs, please:
 
 Submit issues to [issue tracker](https://github.com/hairyhenderson/gomplate/issues/).
 
+Any bug fix PRs must also include unit tests and/or integration tests to prevent regression.
+
 If you think you've found a sensitive security issue, please e-mail me before opening an issue: dhenderson@gmail.com. My PGP key is available on Keybase: https://keybase.io/dhenderson/.
 
 ## Versioning, API and Deprecation
@@ -40,6 +42,8 @@ Sometimes, a deprecation is necessary. I will mark these deprecations in the doc
 
 ## Style Guide
 
+Code style is enforced by [`golangci-lint`](https://github.com/golangci/golangci-lint) during CI builds.
+
 ### Template Function Style
 
 Gomplate's code base has grown organically, and so it's full of quirks and inconsistencies. However, there are a few style points that have emerged over the years: